package com.heima.wemedia.service.impl;


import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {


    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;


    @Autowired
    private WmMaterialMapper wmMaterialMapper;


    @Autowired
    private WmNewsTaskService wmNewsTaskService;

    /**
     * 条件查询文章列表
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmNewsPageReqDto dto) {
        // 检查参数
        // 分页检查
        dto.checkParam();
        // 分页条件查询
        IPage page=new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        // 状态查询
        if(dto.getStatus() !=null){
            lambdaQueryWrapper.eq(WmNews::getStatus,dto.getStatus());
        }
        // 频道查询
        if(dto.getChannelId()!=null){
            lambdaQueryWrapper.eq(WmNews::getChannelId,dto.getChannelId());
        }
        // 时间范围查询
        if(dto.getBeginPubDate()!=null && dto.getEndPubDate()!=null){
            lambdaQueryWrapper.between(WmNews::getPublishTime,dto.getBeginPubDate(),dto.getEndPubDate());
        }
        // 关键字查询
        if(dto.getKeyword()!=null){
            lambdaQueryWrapper.like(WmNews::getTitle,dto.getKeyword());
        }
        // 查询当前登录人的文章
        lambdaQueryWrapper.eq(WmNews::getUserId,WmThreadLocalUtil.getUser().getId());
        // 发布时间倒叙
        lambdaQueryWrapper.orderByDesc(WmNews::getCreatedTime);
        // 结果返回
        page=page(page,lambdaQueryWrapper);

        ResponseResult result=new PageResponseResult(dto.getPage(),dto.getSize(),(int)page.getTotal());

        result.setData(page.getRecords());

        return result;
    }


    @Override
    public ResponseResult submitNews(WmNewsDto dto) {

        if(dto==null || dto.getContent() ==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        // 保存或修改文章
        WmNews wmNews=new WmNews();
        // 属性拷贝
        BeanUtils.copyProperties(dto,wmNews);

        // 封面图片 list-->string
        if(dto.getImages()!=null || dto.getImages().size()>0){
            // ada.jpg,asq.jpg
            String imageStr = StringUtils.join(dto.getImages(), ",");
            wmNews.setImages(imageStr);
        }

        // 如果封面类型为自动
        if(dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
            wmNews.setType(null);
        }

        saveOrUpdateWmNews(wmNews);

        // 判断是否为草稿
        if(dto.getStatus().equals(WmNews.Status.NORMAL.getCode())){
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }

        // 不是草稿,保存文章与素材的关系
        List<String> materials=getUrlInfo(dto.getContent());

        //saveContent(materials,wmNews.getId());

        wmNewsTaskService.addNewsToTask(wmNews.getId(),wmNews.getPublishTime());

        // 不是草稿,保存文章封面内容图片与素材的关系
        // 如果是自动匹配,需要匹配封面图片
        saveCover(dto,wmNews,materials);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /*
    * 如果当前封面类型为自动,则设置封面类型的数据
    * 匹配规则：
    * 1，如果内容图片大于等于1，小于3  单图  type 1
    * 2，如果内容图片大于等于3  多图  type 3
    * 3，如果内容没有图片，无图  type 0
    * 保存封面图片与素材的关系
    * */
    private void saveCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();

        //如果当前封面类型为自动，则设置封面类型的数据
        if(dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
            //多图
            if(materials.size() >= 3){
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images = materials.stream().limit(3).collect(Collectors.toList());
            }else if(materials.size() >= 1 && materials.size() < 3){
                //单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());
            }else {
                //无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);
            }

            //修改文章
            if(images != null && images.size() > 0){
                wmNews.setImages(StringUtils.join(images,","));
            }
            updateById(wmNews);
        }
        //第二个功能：保存封面图片与素材的关系
        if(images != null && images.size() > 0){
            saveInfo(images,wmNews.getId(),WemediaConstants.WM_COVER_REFERENCE);
        }
    }

    /*
    * 处理文章与图片素材的关系
    * */
    private void saveContent(List<String> materials, Integer newsId) {
        saveInfo(materials,newsId,WemediaConstants.WM_CONTENT_REFERENCE);
    }

    /*
    * 保存文章与图片到数据库中
    * */
    private void saveInfo(List<String> materials, Integer newsId, Short wmContentReference) {

        if(materials!=null && !materials.isEmpty()){

            // 通过图片的url素材的id
            List<WmMaterial> dbmaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));

            // 判断素材是否有效
            if(dbmaterials==null || dbmaterials.size()==0){

                throw  new CustomException(AppHttpCodeEnum.MATERILAS_FAIL);
            }

            if(materials.size() !=dbmaterials.size()){
                throw  new CustomException(AppHttpCodeEnum.MATERILAS_FAIL);
            }

            List<Integer> list = dbmaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());

            // 批量保存
            wmNewsMaterialMapper.saveRelations(list,newsId,wmContentReference);

        }

    }


    /*
    * 提取文章中的图片信息
    * */
    private List<String> getUrlInfo(String content) {

        List<String> materials=new ArrayList<>();

        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps) {

            if(map.get("type").equals("image")){
                String imgUrl= (String) map.get("value");
                materials.add(imgUrl);
            }
        }
        return materials;
    }

    /*
    * 保存或修改文章
    * */
    private void saveOrUpdateWmNews(WmNews wmNews) {

        // 补全属性
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setEnable((short)1);// 默认上架

        if(wmNews.getId() ==null){
            save(wmNews);
        }else {
            // 修改
            // 删除文章与素材之间的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId,wmNews.getId()));
            updateById(wmNews);
        }
    }

}
